Combined bruising and crushing roller-mill.



No. 830,075. PATENTED SEPT. 4, 190a.

A. JOEL. COMBINED BRUISING AND GRUSHING ROLLER MILL.

APPLICATION FILED DEO.22,1904.

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A. JOEL.

COMBINED BRUISING AND ORUSHING ROLLER MILL. APPLIOATION FILEDDEO.22,1904.

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COMBINED BRUISING AND CRUSHING ROLLER-MILL.

Specification of Letters Patent.

Patented Sept. 4:, 1906.

Application filed December 22, 190 Serial No. 237,988.

To all whom, it may concern:

Be it known that I, ALFRED JOEL, a citizen of Switzerland, residing atZurich, Switzerland, have invented new and useful Improvements in aCombined Bruising and Crushing Roller-Mill, of which the following is aspecification.

For some time efforts have been made to construct a mill that wouldbruise and crush at the same time. These efforts resulted in thecombined bruising and crushing mills with smooth rollers andgrinding-disks which are built especially in En land. However, in themills of this type onIy the hopper and the frame are united, while thebruising and .crushing is eflected by means of apparatus which are keptseparate. Moreover, the high price of these combined mills has preventedthem from coming into general use.

The present invention has for its object a mill which effects in a verysimple manner the work of bruising and crushing on the same part.

In the annexed drawings several forms of execution are shown asrepresentative ex amples.

Figure 1 is a perspective view showing the subject-matter of thisinvention with two rollers. Fig. 2 is a plan view representing thearrangement of rollers accordin to Fig. 1. Figs. 3 and 4 show modifiedforms of rollers.

In Fig. 2 the working parts are shown as follows: By means of pulley fand of gear wheels h h the rollers A B are made to turn in oppositedirections on shafts g g, which run in bearings 7c, secured on a frame'i i.

Figs. 1 and 2 show that the working rollers are provided only on onepart of their length a with a fluted surface, while the other part aremains smooth.

The roughened or fluted portion is intended for bruising, while thesmooth portion is used for crushing. According to the division of therollers the hopper I) and the feedtable 0 are also divided into twoportions 1) i b and c c by means of the partition-wall d for the hopperand the stay e for the feedtable.

In view of the fact that the crushing opera tion can be best effectedwith rollers having a different speed of rotation, while a betterbruised product will be obtained with rollers having the same speed ofrotation the wheels can be geared so as to correspond to therequirements for crushing and if the machine has to be used solely forbruising gear-wheel h, Fig. 2, can be taken off, and the loose roller Bis then taken alon at the same speed by the driven roller A so ely onaccount of its adhesion.

In order to obtain without the necessity of exchanging the gear-wheelsfor the simultaneous operations of crushing and bruising on the flutedcrushing portion different and on the smooth bruising ortion uniformspeeds of rotation of the ro lers, the following constructions may beprovided.

One of the rollers C and D, Fig. 4, is provided with a smooth portion m,which turns on shaft g, so that when the rollers are driven at differentspeeds the turning smooth portion is drawn along by friction with thatof the fixed roller 0. The two smooth roller portions have thereforeuniform speeds of rotation, while the fluted portions are driven atdifferent s eeds.

Fig. 3 s'liows that the two portions of the two rollers E and F can alsohave different diameters, so that when gear-wheels with correspondingdiameters are used the fluted portions n n work'with different and thesmooth portions 0 0 with uniform speeds of rotation. above-describedkind there might also be used each time one fluted or roughened rollerand one smooth roller, each of which has the width of the res ectiveidentical portion of the combined rol er and each of which can beprovided with separate gear-wheels, so that the desired uniform anddifferent speeds of rotation can be obtained.

In order to facilitate their construction, the combined rollers canalsobe composed of two or more pieces.

I claim as my invention- 1. A mill having a roller which has on oneportion of its length a roughened or fluted surface and on the adjacentportion a smooth surface and a second roller having similar workingsurfaces coacting therewith so as to allow the mill to be used forcrushing as well as for bruising.

2. A mill having two rollers provided with rough and smooth surfaces,and means for rotating the contacting rough surfaces at different speedsand the smooth surfaces at substantially the same speeds.

However, besides a roller of the 3. Amill having two rollers providedwith In testimony whereof I have signed my smooth and rough contactingsurfaces, the name to this specification in the presence Of/IO smoothportion of one roller having turning two subscribing Witnesses. movementin relation to the rough portion 5 so that said smooth portion canattain the ALFRED JOEL speed of rotation of the counteracting smoothWitnesses: portion of theoth'er roller When the two roll- J OSEPH SIMON,

ers are differentially geared. A. LIEBERKNEOHT.

